Fotga Quick Release Plate PU50 for B0 B1 B2 J0 J1 Benro Arca Swiss Standard Ballhead Anti-twist locking screws match the international standards employed by manufacturers of Arca-syle QR mounts (Acratech, Kirk, RRS, Wimberley and others). Special anti-slip rubber pads enhance the grip between each plate and the mounted gear, and protect the gear from any damage due to mounting. Suitable for:Benro B and J series,Arca Swiss standard Material: completely metal. Package including:Quick release base plate PU-50 x1, 1/4" screw x1